Speedometer.



No. 844,684; I P ATENTED FEB. 19,1907... G. LOMBARDI.

SPBEDOMETER.

APPLIOATION TILED SEPT.24,1906.

2 SHEETS-SHEET 1.

WITNESSES 74x11 00% W 4W A TTOBNEY PATENTED FEB. 19, 1907.

G. LOMBARDI.

SPEEDOMETER.

APPLICATION FILED SEPT. 24 1906.

2 SHEETS-SHEET 2 WITNESSES lNVENTOB A TTORN E Y UNITED STATES PATENT @FFICE.

GIOVANNI LOMBARDI, OF DERBY, CONNEC'lICl ll""" SPEEDONIETEFEn To all 1071-0111) zit-ma i 00recern:

Be it known that I, GIOVANNI LOMBARDI,

a citizen of the United States, residing3 at Derby, county of New Haven, State of .n'ecticut, have invented a new and useful. Speedometer, of which the followin ,specification. I i g a. This invention has for its'objec 'plify and'ch'eapen the construction- -a greatly improve the operation of -ce1:i-

speedrrdicators or. speedometers-thiitis instruments for indicating the s eed of yehicles, shafts,- and other moving odies. i With this and other objects in view I have devised the nvel speedometer ofwhich the following description, in connection with the accompanying drawings, is a specification, reference'charaet'ers being used to-indicate the several parts.

Figure 1 is anelevation of my novel speed omet'er, showing in connection therewith an odometerpFig. 2, a section on the-line 2. 2 in Fig. 1 looking in the direction of the arrows; Fig. 3, an inverted plan view ofthe facelate, showing the parts carried thereby ;,and

ig. -4is a plan view of parts within thecase which coact with the parts carried by the face-plate.

denotes the case, which is hemispherical in form and the bottom of which is provided with an opening at one side of the center, which is surrounded by a flan e 11, both opening and flange being interna l threaded.

14, which is secured in any suitable manner in the upper edge of the case.

denotesa crystal or plate of glass which covers .the' dial, leaving a space between them, and is shown as secured to the case by a flanged ring 16, engaging the outer side of he ease.

The standard is shown as provided with an ear 17 to adapt it for attachment to any suitable part, as to abracket 18. The standard is also shown as pr'ovidedwith an enlargement 19 to receive the operating-gear 20 of an odometer, which is indicated as a whole by 21.

The. essential features of the present invention are the. parts carried by the face-plate.

Specification of Letters Patent.

Application filed September 24, 1906. Serial No. 836,080.

22 denotes the pointer, which is carriedbya shaft 23, journaled at one side of the face,-

plate and extending downward into the/case,

the. lower end thereof being stepped in: a 60 bracket 24, which is secure'dtoi the face,-

plate. 25 denotes an arm extending from the pomter-shaft, and 26a light spring; coninected to the shaft and to: the=bracket,.the

action of which is to turnthe shaft andcarry 'the pointer toward the right from thepos tion shown in Fig. 1that is, toward the graduations indicatingihiglr speed. .27 de notes a cam carried by a shaft ',2S, journaled in brackets 29, secured to the face-plate,:the 7o operative face of whichiscngaged 'byathe arm 25, extending fronrtheointer-shaft.

An arm 30, extending from t ieca n-shaft,

bears against the end of aplunger 3-1 ,1-,.which reciprocates freely in a-socket 32,- s'ecuredto 7 5 the face-plate obliquelytoithe plane thereof and in such a position-that said: lunger will lie in alinement with the axis oft 1e standard.

The socket is providedwi'tha slot 33,through which arm 30 passes. A'spring 4 7,onfshaft 8o 28 acts to retain arm 30in engagement with the end of plunger 31 and" also toretainit-he cam in operative position. .1

The special form of operating is unimportant so far as the principle oftlie 85 invention is concerned. fIn the-presenttz-instance I have illustrated; mechanism operating on the principle of acentrifugal governor.

34 denotes a shaft mounted to rotate freely in the standard, to which a flexible o'r-other 9o shaft (not shown) is con'nectedxin any suit- 'able manner. Shaft 34carries asgearn35,

which meshes with gear 20 to operate the odometer, and carries at its upper, 611C178,

plate 36. 37 denotes ball-bearings for shaft 5 34, and '38 a longitudinal opening -in-said shaft. 39 denotes a plunger-in opening 38,

which rests upon a sprmg40 and-carries at its upper end a plate 41,=.'which lies in a-recess 42 in plate 36 and is engaged by plunger 31. 00

43 denotes levers pivoted in .recesses '44 in plate 36, the'relatively short u per arms of which are curved inward to a apt them to 1 bear upon the top of plate4 1 and the relatively long lower arms of which carry weights 45. 10 5 The lower end of spring 40 restsiu-pon an adjusting-screw 46, by means Yofwhich-the. tcnsion of'the spring may beregulated. wk ea-.-

Hcretofore, so far as IZam aware, .in instruments of this character'inechanisnr has been i 10 provided the operation' ofwhichhas been'to movethe pointer to indicate amincrea'se 1n speed. In the present construction, however, the pointer-spring normally moves the pointer in the direction to indicate high speed','and the pointer is normally'held at zero against the power of the counter-spring through the engagement of cam 27 with the arm 25, extending from the pointer-shaft.

The operation is as follows: In the-normal will be apparent that spring 47 must be strong enough to overcome the power of spring 26, so that movement of the cam to its normal position willplace the pointer in its normal positionthat is, at zero on the dial-against the power of spring 26, and that spring 40 must readily overcome the power of spring 47 in order to control the cam. In use rotation of shaft 34 will cause the weights to fly outward by centrifugal power, and the curvedupper arms of the vers will force plate 41'and plunger 39 downward against the power of spring 40, which will permit plunger 31 to move downward and -will cause spring 47 to turn the cam shaft and sW-ingthe cam, thereby relieving the pressure of the cam on arm 25, extending from the pointer -.shaft, and permitting spring 26 to turn the pointer-shaft and swing t e pointer in the direction to indicate speed.

It should be understood thatthe movements of the pointer to indicate speed are controlled y the pointer-spring and thatthe operation of the intermediate connections,

controlled in the present'instance by-shaft 28, is to relieve the retaining pressure of the cam which has retained the pointer at zero, so that when the pointer, in fact, fol owe the dam instead of eing operated by the cam. I thus insure a much steadier movement of the pointerthan is possible where the pointer is operated di- 7 rectly by actuating connections. Having thus described my invention, I claim.

'1. An instrument of the character described comprising a pointer, a. shaft by which said pointer is carried and which is provided with an outwardly-extendin arm, a s ring normally acting to move sai fshaft an pointer in the directlon to indicate speed,

a cam enga ing said arm and acting to re-v and pointer at their normalpotainthe shaft sitionagainst the power of the spring, a

shaftby 'whi ch said. cam

extending rem Said,.js n

ressure is relieved ,the

.;.gplunger gengag ing said arm and acting to retain the shaft and cam in the normal position,- and a spring on saidshaft of greater power than the pointer-spring by which the shaft, arm and cam are retained inoperative position.

2'. An-instrument of the character described comprising a pointer, a-s'pring normally acting to move .said pointer in the direction to mdlcate' speed, means for retaining'the pointer at its normal position against the power of the spring, and operating means comprising a shaft carrying a plate 36, levers pivoted ins'aid plate and carrying weights and a spring-controlled plunger in said shaft carrying a plate 41 which is engaged by the short armsof the levers and the pointer-retaining means, so that when the shaft is rotated the wei hts will swing outward and the short arms 0 the levers will force plate 41 and the plunger downward, whereby the tension on the pointer-spring is relieved and the pointer is caused to indicate the speed.

'3. The combinationwith the hemisphericalcase 10 havin an opening at one side of the center of the bottom, of 'a standard secured in said opening .obli uely to' the axis of the case so that when t e standard is fixed in the-vertical plane the case will lie obliquely to the. vertical plane, substantially as described, for the pur ose specified. 1

' 4. The combination'with a hemispherical case having an opening at one side of the bot tom, a standard secured in said opening obliquely to the axis of the case, a face-plate secured in the case and provided with a dial, a pointer, a shaft by which the ointer is carried and which is journaled in t e face-plate, 'and a spring normally acting to move said shaft and po nter in the direction to indicate s' eed, of a hollow shaft mounted to rotate in t e standard, a, spring-controlled plunger in said shaft .carryinga plate 41, levers carried by. the shaft whose short arms engage the plate and whose long arms are provided with weights, and intermediate connections between: the plun er and the pointer-shaft,

whereby when t e hollow shaftis' rotated the "tension on the pointer spring is relieved and.

the pointer is causedlto indicate the speed;

In ani i trument of the character describedthe combination the standard, anodometer and a s eedometer .carried thereby, of a vhollo'w. 'sha mounted to rotate in the standard and carrying an operatinggear for the odometer, and speedometer operating mechanism also carried by theshaft and comprising a spring-controlled plunger carrying aplate, levers whose short arms are curved to engage the. late and weights .up'on thelongarms of the evers, substantially as described, for the-purpose specified.

6. In an instrument of the character de-' scribed the combination with .a standard and a hollow shaft mounted to rotate therein, of'

a plnngerjnsaid shaftcarrying a plate, levers iro Whose short arms arecurved to engage the plate, Weights upon the long arms of the levers, a spring on which the plunger rests and an ad justing-screw for regulating the tension of the spring. l

7. An instrument of the character described comprising acase, a face-plate pro-" vided Witha dial, ap'ointer, a shaft therefor journaled at one side of the face-plate] and having an arm extending therefrom, ag sprlng, connected to said shaft and acting toazmnirfie the pointer in the direction to indicate 'speef a' cam engaging the arm by which the tensioi-l' on the pointer-spring is controlled, and crating means acting upon the cam by which the-tension of the pointer-spring is relieved as speed-increases;

8 "In an instrument of the character described the combination with a case set ob- -lique ly to the vertical plane and having a faceplate providedwith a dial and operating con-- 'nections, of a "pointer, a shaft therefor journaled atfflone'sjide of the face-plate and having "to move -'t'- l ie pointer in the direction to ind1 which the tension of the spring is controlled,- a shaft for said cam Which'is-carried by the face-plate, an arm extending therefrom, a plunger engaged by saidarm, and a socket for said plunger secured to the face-plate obliquely to the plane thereof.

In testimony whereof I affix my signature in presence. of two witnesses. GIOVANNI LOMBARDI. Witnesses:

DANIEL B. GIDDINGs, GEORGE I-I. KNE'EN.

gan armjex-tending therefrom, a spring acting c'ate speed,':a cam engaging said arm by 

